Earth's early life might have been purple, suggesting the search for extraterrestrial life should scan for the color.
Aliens can refer to everything from little green men in the sci-fi realm to microscopic life forms beyond Earth. For all these possibilities, Live Science has you covered. We break down the latest discoveries that hint at life on other planets and the state of scientific searches for such extraterrestrial life. Sometimes, we may dissect a "little green man" sighting as well.
The brightest lights you cannot see are bombarding Earth from another galaxy, and they could be signs of aliens.
Astronomers used A.I. to find 72 more fast radio bursts, but they are still puzzled over what the flashes are.
A rogue, planet-size object 20 light-years away from Earth has stunned astronomers with its incredibly powerful magnetic field.
With every new exoplanet discovered, the same question arises: Could this world host life? That capability requires so much more than liquid water.
A team of researchers pursuing the search for extraterrestrial intelligence has decided to revive a scale meant to ground alien-detection alerts in reality.
A new paper opens a door to the possibility of life having maybe once existed, possibly, on the moon. But it presents no direct evidence for life.
Large molecules coming out of Enceladus, one of Saturn's moons, might be produced by a biological source beneath the surface.
If and when humans discover extraterrestrial intelligence, should we expect to find it in the form of biological brains or artificially intelligent robots?
Advanced alien civilizations might be towing distant starts to their local galaxies to thwart dark energy … and that's how we'll find them.